Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
When you renew a Microsoft 365 subscription, you are not provided with a product key, that is a digital licence associated to your Microsoft account online and it is from there that you can manage and install the Office apps..
Log into your Microsoft account on this link (https://account.microsoft.com/services/), do you find your subscription listed there, and if so, check the expiry date on the subscription, is it listed correctly for your renewal payment.
If you are unable to find your subscription, or if there is a problem indicated with your subscription, this forum is just a user to user forum, no-one here has any account access, you will need to contact Microsoft Support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option